Watering and Humidity for Cactus Seedlings
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Photograph for growing reference; seedling results vary by species and conditions.
Seedlings are not mature cacti
Newly germinated seedlings generally require more consistent surface moisture than established desert cacti. A propagation cover can help retain humidity, but should not create stagnant, overheated conditions.
Prevent problems
Use a clean, well-draining medium. Avoid leaving the container waterlogged. Watch for fuzzy growth, collapsing seedlings and unpleasant odors, which can indicate fungal or moisture problems.
Adjust over time
As seedlings become established, increase ventilation and lengthen drying intervals gradually according to the species and growing environment. Do not abruptly move tender seedlings to a fully dry adult-cactus schedule.